港口岸电电缆提升装置多工况力学分析与优化设计

Mechanical analysis and optimization design of multi-working conditions of electric cable hoisting device in port

随着国家电网电能替代战略全力推进,船舶用电由原有的燃煤供电转化为依靠港口电缆供电,这促使国内电缆输送装置需求量剧增.电缆提升装置作为电缆输送装置重要组成部分,其结构强度直接决定电缆输送过程的可靠性,然而对其缺乏相关研究.文中首先研究原始模型在0~8级风时,3种工况下,1~4层应力分布情况;并对1~4层进行拓扑优化设计,对优化后的结果进行分析.结果显示,优化后1~4层总质量降低11.2%,且X型交叉结构有利于装置强度加强.在3种工况下,2~4层强度均得到有效提高,且最大应力均出现在第4层偏心轴处,其中工况a为最差工况.在风载荷与倾斜方向垂直的工况下,风级不超过5级时,重力是影响最大应力主要因素;风级超过5级时,风载荷是影响应力主要因素.优化后,最易破坏的第3层的破坏方式得到改变,破坏位置发生转移.

With the national power grid to push forward the alternative strategy of electric energy,the power supply of ship power from the original coal is converted to the power supply of the port cable,which has prompted the demand for the domestic cable transport devices to increase dramatically.Cable lifting device is an important part of cable conveyance device.The strength of cable hoisting device directly determines the reliability of cable conveying process,but relevant research is lacking.Firstly,the stress distribution of 1~4 layers under three working conditions is studied when the original model is at 0~8.The topology optimization design of 1~4 layers is carried out,and the optimized results are analyzed.The results showed that after optimization,the total mass of 1~4 layers decreased by 11.2%,and the X-type cross-structure was beneficial to the strengthening of the device.Under the three conditions,the 2~4 layer strength is effectively raised,and the maximum stress occurred in the fourth layer of the eccentric shaft,and the working condition a is the worst.Under the working condition that the wind load is perpendicular to the inclination direction,gravity is the main factor of maximum stress when the wind level does not exceed 5.Wind load is the main factor affecting stress when wind level exceeds 5.After optimization,the destruction mode of the third layer which is most vulnerable to damage is changed,and the damage location is transferred.